KR101489190B1 - The oil mist, organic solvent recovering device Included in industrial exhaust gases and method of recovering oil mist, organic solvent using the same - Google Patents

Abstract

The present invention aims to provide an apparatus for recollecting oil mist and an organic solvent included in industrial exhaust gas with increased efficiency; and a method for recollecting oil mist and an organic solvent using the same apparatus. The apparatus comprises an air blower which transfers the exhaust gas by using high pressure; a heat exchanger on which a first recollection part recollecting the oil mist and the organic solvents such as VOCs is installed; a cooling water supplying means which supplies cooling water to the inside of a first body of the heat exchanger and circulates the cooling water; a transfer pipe having a temperature sensor on one side of an outer circumferential surface thereof; an electrical dust collector on which a second recollection part recollecting the oil mist and the organic solvents such as VOCs is installed; and a discharging pipe that discharges the exhaust gas from which the oil mist and the organic solvents such as VOCs are separated by the electrical dust collector to the outside.

Description

Technical Field [0001] The present invention relates to an oil mist, an organic solvent recovery apparatus, an oil mist, and an organic solvent recovery method using an oil mist contained in an industrial exhaust gas,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil mist, an organic solvent recovery device, and an oil mist and an organic solvent recovery method using the oil mist and the organic solvent recovered in an industrial exhaust gas, It is possible to recover organic solvents such as oil mist and VOCs contained in the exhaust gas discharged from industrial facilities such as paint and paint manufacturing and lubricating oil production by electrostatic dust collection by cooling and corona discharge, An oil mist contained in an exhaust gas, an organic solvent recovery device, an oil mist using the same and an organic solvent recovery method.

In general, exhaust gases from industrial facilities such as textile dyeing, food processing, paper processing, food waste treatment, sewage treatment, metal processing, paint and paint manufacturing, and lubricant manufacturing include organic solvents such as oil mist and VOCs This causes air pollution such as odor.

In order to remove atmospheric pollutants generated in the tentering process of textile and dyeing facilities among the above-mentioned industrial facilities, most companies have proposed absorption towers using an adsorption tower using activated carbon or washing with water as disclosed in Korean Patent Publication No. 10-2001-0058524 I am using the tower. However, it is technically difficult to effectively remove organic solvents such as fine oil mist and VOCs.

When the exhaust gas having a temperature higher than 50 ° C is introduced into the activated carbon adsorption tower, the adsorption effect of the organic solvent is significantly lowered. There is a problem that the replacement cycle of the activated carbon must be very short.

In the case of an absorption tower for washing with water, since it has a high temperature on the order of 100 ° C to 120 ° C even in the case of exhaust gas passing through a heat exchanger, it is still discharged into the atmosphere while containing the oil mist in a whitened state. , Only part of the water is condensed by the washing water in the absorption tower, and most of the water is diffused into the atmosphere.

Korean Patent Publication No. 10-2001-0058524 (July 2006)

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in an effort to solve the problems of the prior art as described above, and it is an object of the present invention to provide a method of manufacturing a coating material, An organic solvent recovery device and an organic solvent recovery device included in an industrial exhaust gas that can exhibit improved recovery efficiency by recovering organic solvents such as oil mist and VOCs contained in the exhaust gas by an electric dust collection method by cooling and corona discharge And an object of the present invention is to provide an oil mist and an organic solvent recovery method using the same.

In order to achieve the above-mentioned object, the present invention can be applied to an industrial facility such as textile, dyeing, food processing, paper processing, food waste treatment, sewage treatment, metal processing, An apparatus for recovering organic solvents such as oil mist and VOCs contained in a moving exhaust gas, the apparatus comprising: a blower installed to be connected to the duct and moving the exhaust gas moved along the duct to a high pressure; A first body having a first inlet port on a front side and a first outlet port on a rear side so that the exhaust gas flowing from the blower can be introduced and discharged, and the first body is connected to the blower, A heat exchanger provided with a plurality of heat transfer tubes through which gas is transferred and a first recovery section for recovering organic solvents such as oil mist and VOCs condensed and discharged into the heat transfer tube at a lower side of the rear side of the first body; A cooling water supply means connected to the heat exchanger for circulating cooling water to the inside of the first body of the heat exchanger; A moving pipe having a tube connected to the first body discharge port of the heat exchanger and having a temperature sensor on one side of the outer circumference; A second body having a second inlet port on the front side and a second outlet port on the rear side for allowing the exhaust gas flowing from the moving pipe to flow in and out is connected to the moving pipe and formed into a circular tube shape inside the second body, And a discharge electrode portion is inserted in a longitudinal direction from a center portion on the front side of the dust collecting electrode portion to a front side of the discharge electrode portion, A discharge frame for supporting the discharge electrode portion is formed at an end of the discharge frame, a connection hole is provided between the edge portion of the plate facing the front side of the discharge frame, and an oil is adsorbed on the inner surface of the dust collecting electrode portion, An electrostatic precipitator provided with a second recovery unit for recovering organic solvents such as mist and VOCs; And an exhaust pipe connected to the second exhaust port of the electrostatic precipitator second body for discharging organic solvents such as oil mist and VOCs and exhaust gas separated by the electrostatic precipitator to the outside. An oil mist contained in the gas, and an organic solvent recovery device.

Further, according to the present invention, the operation of the heat exchanger and the cooling water supply means is delayed for a predetermined period of time, and the high temperature exhaust gas is introduced into the electrostatic precipitator to trap the residual oil mist trapped on the dust collecting electrode portion and the discharging electrode portion, An initial operation step of separating organic solvents such as VOCs from the collecting electrode part and the discharging electrode part as much as possible; The heat exchanger and the cooling water supply means are operated to cool the exhaust gas flowing into the heat transfer pipe of the heat exchanger, A primary recovery step of collecting and recovering organic solvents such as oil mist and VOCs contained in the gas; When the exhaust gas from which a part of the organic solvents such as oil mist and VOCs is collected by the primary collecting step flows into the electrostatic precipitator, the organic solvent such as oil mist and VOCs contained in the exhaust gas through the corona discharge of the electrostatic precipitator A second recovery step of adsorbing and collecting the adsorbent; The exhaust gas completely separated from the organic solvents such as oil mist and VOCs is discharged to the outside by the secondary collecting step and the recovery operation of the organic solvents such as the oil mist and the VOCs is completed and the operation of the heat exchanger and the cooling water supply means And stopping the power supply to the blower and the electrostatic precipitator after the organic solvents such as oil mist and VOCs remaining in the heat exchanger and the electrostatic precipitator are sufficiently removed. Mist, an oil mist using an organic solvent recovery device, and an organic solvent recovery method.

The oil mist, the organic solvent recovery device, the oil mist, and the organic solvent recovery method using the oil mist, the organic solvent recovery device, and the organic mist recovery method according to the present invention can be used for textile, dyeing, food processing, papermaking, food waste, It can be used in various industrial facilities such as paint, paint manufacturing and lubricant production. It can quickly recover oil mist and organic solvent contained in exhaust gas, and also can recover VOCs, organic carbon compounds, dust, There is an effect that various pollutants such as aerosols can be recovered.

In addition, since the exhaust gas, which is high in temperature, is moved to the optimum temperature by the heat exchanger, it is prevented from being deformed by the exhaust gas at high temperature before the deodorizing electrode part of the electrostatic precipitator is deformed, And the organic solvents such as oil mist and VOCs condensed by cooling can be easily discharged along the inclined heat transfer pipe and can be recovered in the primary stage. The viscous oil mist and VOCs And organic solvents such as oil mist and VOCs remaining in the heat transfer tube can be minimized, so that the inside of the heat transfer tube can be kept uniform and clean at all times.

In addition, the discharge electrode portion of the electrostatic precipitator may be formed in the shape of a circular or polygonal round bar, and the dust collecting electrode portion may be formed in a circular tube shape and a predetermined thickness to prevent thermal deformation. The cutout portion for dropping the organic solvents downward in the vertical direction can be formed at the lower portion of the dust collecting electrode portion to minimize the organic solvents such as oil mist and VOCs remaining in the dust collecting electrode portion so that the inside of the dust collecting electrode portion is always uniform and clean And the organic solvents such as oil mist and VOCs separated from the exhaust gas are prevented from being re-dispersed together with the exhaust gas discharged from the exhaust gas, thereby improving the recovery efficiency, and the dust collecting electrode portion and the discharging electrode portion are formed into a circular shape, It has an effect of minimizing the resistance to the moving speed of the gas.

Further, the electrostatic precipitator can be modularized, and the electrostatic precipitator can be arranged in a plurality of layers or in multiple layers according to the installation capacity.

1 is a side view of an oil mist and organic solvent recovery device included in an industrial exhaust gas according to the present invention;
2 is a partial side sectional view of a heat exchanger according to the present invention,
3 is a perspective view of an electrostatic precipitator according to the present invention,
FIG. 4 is a front view of a discharge electrode unit and a dust collecting electrode unit module in the electrostatic precipitator according to the present invention, and a flow chart of organic solvents such as recovered oil mist and VOCs,
5 is a side sectional view of the discharge electrode unit and the dust collecting electrode sub-module in the electrostatic precipitator according to the present invention, and a flow chart of organic solvents such as recovered oil mist and VOCs,
FIG. 6 is a side sectional view in the use state showing another embodiment of the present invention,
FIG. 7 is a flowchart showing an oil mist and an organic solvent recovery method according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 7, the oil mist and organic solvent recovering apparatus included in the industrial exhaust gas according to the present invention can be used for textile, dyeing, food processing, paper making, food waste treatment, sewage treatment, metalworking, A blower 10 for collecting organic solvents such as oil mist and VOCs contained in an exhaust gas collected in a hood 2 installed in an industrial facility 1 such as a lubricating oil and moving to a duct 5, A heat exchanger 20, a cooling water supply means 30, a moving pipe 40, an electrostatic precipitator 50, and a discharge pipe 60.

As shown in FIG. 1, the blower 10 is installed in the hood 2 installed in the industrial facility 1 so as to move the exhaust gas, which is moved to the duct 5, It is installed to be connected.

The blower 10 is preferably installed on the front side of the heat exchanger 20 but may be installed on the rear side of the electrostatic precipitator 50 depending on the types of contaminants contained in the working site and the exhaust gas.

Meanwhile, the exhaust gas flowing from the blower 10 flows into the heat exchanger 20. The heat exchanger 20 includes a first body 21 having a first inlet 21a at the front side and a first outlet 21b at the rear side for exhausting the exhaust gas, And a plurality of heat transfer tubes 22, which are formed in the first body 21 in the shape of a tube and on which the exhaust gas is moved, are provided.

At this time, as shown in FIG. 2, the heat transfer pipe 22 is inclined downward toward the rear side. Thus, organic solvents such as oil mist and VOCs contained in the exhaust gas flowing into the heat transfer pipe 22 are easily discharged.

Further, organic solvents such as viscous oil mist and VOCs are smoothly discharged due to inclination of the heat transfer pipe 22, and organic solvents such as oil mist and VOCs remaining in the heat transfer pipe 22 can be minimized So that the inside of the heat transfer pipe 22 can be maintained in a uniform and clean state at all times.

Preferably, the heat transfer pipe 22 is inclined at 2 to 7 degrees from a horizontal line to a downward direction.

Further, the heat exchanger 20 can be changed in heat exchange manner according to the temperature of the exhaust gas and the condition of the installation site, and it is not necessary to provide the heat exchanger 20 in case of exhaust gas flowing below 60 ° C. The heat exchanger 20 is installed when the temperature can be condensed at 60 캜 or lower.

And a cooling water supply unit 30 for supplying cooling water to the inside of the first body 21 of the heat exchanger 20 is connected to the heat exchanger 20. [

A moving pipe 40 formed in a tubular shape is provided in the first outlet 21b of the first body 21 of the heat exchanger 20 and a temperature sensor 41 is provided on one side of the outer circumference of the moving pipe 40 The temperature of the exhaust gas discharged to the first outlet 21b of the first body 21 of the heat exchanger 20 is measured and supplied to the inside of the first body 21 of the heat exchanger 20 from the cooling water supply means 30 The cooling of the circulated cooling water is blocked or resumed so that the temperature of the exhaust gas is maintained at the optimum temperature.

The temperature of the exhaust gas is lowered to the optimum temperature by the temperature sensor 41 provided in the heat exchanger 20 and the moving pipe 40 so that the exhaust of the electric dust collector 50 It is possible to prevent the electrode part 52 from being deformed to prevent a fire caused by flame or the like during the corona discharge.

Meanwhile, the exhaust gas moving from the moving pipe (40) flows into the electrostatic precipitator (50). 1, the electrostatic precipitator 50 includes a second body 51 having a second inlet 51a on the front side and a second outlet 51b on the rear side to allow the exhaust gas to flow in and out, And is connected to the moving pipe (40).

As shown in FIG. 3, a plurality of dust collecting electrode portions 52 are formed in the second body 51 in the form of a circular tube, and the front and rear end portions of the plurality of dust collecting electrode portions 52 A plate 53 of a plate-like shape is provided. At this time, the front and rear ends of the dust collecting electrode unit 52 are fixed to the plate 53 by welding or by a thickness of the plate.

Therefore, if a part of the plurality of dust collecting electrode portions 52 is damaged by external pressure during long-term use, the damaged portion can be locally repaired. If repair is impossible, only the damaged dust collecting electrode portion 52 is replaced, It is possible.

In addition, the dust collecting electrode unit 52 may be formed in a circular tube shape and a predetermined thickness to prevent thermal deformation.

The discharge electrode portion 54 is inserted in the longitudinal direction from the center portion on the front side of the dust collecting electrode portion 52 and the discharge electrode portion 54 is connected to the front end portion of the discharge electrode portion 54, A frame 55 is formed and a connection 56 capable of being insulated is provided between the corners of the plate 53 facing each other with the front side edge of the discharge frame 55, (54) is short-circuited so that no current flows.

If a high voltage is applied to the dust collecting electrode unit 52 and the discharge electrode unit 54 in order to recover organic solvents such as oil mist and VOCs contained in the exhaust gas flowing into the electrostatic precipitator 50, The discharge electrode unit 54 is charged to a negative polarity while the dust collecting electrode unit 52 and the discharge electrode unit 54 are corona discharged.

Due to the corona discharge, the (-) discharge electrode portion 54 emits (-) charge, and the electron generation density at this time is about 100 million / cm 2.

Accordingly, the inside of the dust collecting electrode unit 52 becomes charged with the negative (-) charge, and organic solvents such as oil mist and VOCs passing through the dust collecting electrode unit 52 like the exhaust gas absorb (-) charge (-) pole as a whole.

Therefore, the organic solvents such as charged oil mist and VOCs can not pass through the dust collecting electrode unit 52 and are attracted to the (+) polar side and adsorbed, and this process is performed only in 0.01 second.

4 and 5, the organic solvent such as oil mist and VOCs adsorbed on the inner surface of the dust collecting electrode unit 52 moves downward to be dropped and discharged, and the length of the dust collecting electrode unit 52 And an incision 52a is formed in the lower direction.

It is possible to minimize organic solvents such as oil mist and VOCs remaining in the dust collecting electrode portion 52 due to the cutout portion 52a of the dust collecting electrode portion 52 so that the inside of the dust collecting electrode portion 52 is always uniform And the organic solvents such as oil mist and VOCs separated from the exhaust gas are prevented from being re-dispersed along with the discharged exhaust gas, thereby improving the recovery efficiency and improving the recovery efficiency of the dust collecting electrode unit 52 and the discharge electrode unit 54 may be formed in a circular shape so that the resistance against the moving speed of the exhaust gas can be minimized.

6, when the organic solvent such as oil mist and VOCs adsorbed on the inner surface of the dust collecting electrode part 52 is viscous, the dust collecting electrode part 52 and the discharging electrode part 52, (54) can be inclined downward toward the rear side.

At this time, it is preferable that the dust collecting electrode part 52 and the discharge electrode part 54 are inclined 5 to 10 degrees from the horizontal line to the downward direction.

In addition, the discharge electrode unit 54 is preferably formed in the form of a circular rod, but may be formed in a polygonal shape such as a triangle, a square, or a pentagon.

If the discharge electrode portion 54 is formed in a multifocal form, the negative charge (-) emitted from the discharge electrode portion 54 is concentratedly emitted from each corner, thereby increasing the discharge effect.

As shown in FIG. 1, in order to recover organic solvents such as oil mist and VOCs falling down from the cut-off portion 52a of the dust collecting electrode unit 52, (57).

Further, the electrostatic precipitator 50 may be modularized so that the electrostatic precipitator 50 can be arranged in a plurality of layers or multiple layers according to the installation capacity.

In addition, the heat exchanger 20 can be manufactured integrally with the electrostatic precipitator 50 at the rear according to the condition of the installation site, and can be manufactured and installed both horizontally and vertically. When installed vertically, a heat exchanger 20, and an electrostatic precipitator is installed thereon to move the exhaust gas from the upper part to the lower part.

Meanwhile, a discharge pipe 60 for discharging the exhaust gas separated from the organic solvents such as oil mist and VOCs to the outside by the electrostatic precipitator 50 is connected to the second outlet 51b of the electrostatic precipitator 50 second body 51 ).

An oil mist and an organic solvent recovery method using the oil mist and the organic solvent recovery device included in the industrial exhaust gas according to the present invention as described above will be described with reference to FIG.

The operation of the heat exchanger 20 and the cooling water supply means 30 is delayed for a predetermined period of time under the direction of the temperature sensor 41 of the moving pipe 40 and the high temperature exhaust gas is supplied to the electrostatic precipitator Such as residual oil mist and VOCs trapped in the dust collecting electrode portion 52 and the discharging electrode portion 54 of the electrostatic precipitator 50 to flow into the dust collecting electrode portion 52 The discharge electrode unit 54 is separated as much as possible.

(S 2) -The primary recovering step (S 2) -The recovery of residual oil mist and VOCs collected by the dust collecting electrode part (52) and the discharging electrode part (54) of the electrostatic precipitator The cooling water is supplied from the cooling water supply means 30 into the heat exchanger 20 and the exhaust gas flowing into the heat transfer pipe 22 due to the cooling water supplied and circulated into the heat exchanger 20 And organic solvents such as oil mist and VOCs contained in the cooled exhaust gas are condensed and moved along the heat transfer pipe 22 to be discharged to the inner lower portion of the first body 21 of the heat exchanger 20, The first and second collectors 20 and 21 are provided with a first collecting unit 23 installed at a lower portion of the first body 21 of the heat exchanger 20 to collect organic solvents such as oil mist and VOCs, .

Second Recovery Step S3: The exhaust gas, from which a part of the organic solvents such as oil mist and VOCs are recovered, is introduced into the electrostatic precipitator 50 by the first recovery step S2, The organic solvent such as oil mist and VOCs contained in the exhaust gas due to the corona discharge attracts the inner surface of the dust collecting electrode portion 52 and moves downward along the inner surface of the dust collecting electrode portion 52, The electric dust precipitator 50 drops into the inner lower part of the second body 51 by the cutout part 52a of the electrostatic precipitator 50 and the oil mist which is dropped and discharged to the inner lower part of the second body 51, VOCs are recovered through the second collecting part 57 installed in the lower part of the second body 51 of the electrostatic precipitator 50. [

(S4) -The exhaust gas in which the organic solvents such as the oil mist and the VOCs are completely separated by the second recovery step (S3) is transferred to the discharge pipe (60) and discharged to the outside, The operation of the heat exchanger 20 and the cooling water supply means 30 is stopped at a predetermined temperature and the internal surface of the heat transfer pipe 22 of the heat exchanger 20 or the surface of the electrostatic precipitator 22, The organic solvent such as oil mist and VOCs remaining on the surface of the dust collecting electrode portion 52 of the discharge electrode portion 50 and the discharge electrode portion 54 is sufficiently removed and then the power of the blower 10 and the electrostatic precipitator 50 is cut off.

It is possible to prevent organic mist such as oil mist and VOCs on the inner surface of the heat transfer pipe 22 of the heat exchanger 20 or on the surface of the dust collecting electrode portion 52 and the discharge electrode portion 54 of the electrostatic precipitator 50, It is possible to minimize the collection and fixing of the solvent streams and to prevent the harmful gas in the duct 5 from accumulating.

1: Industrial facility 2: Hood
5: duct 10: blower
20: Heat exchanger 30: Cooling water supply means
40: moving tube 50: electrostatic precipitator
60: discharge pipe

Claims (6)

(2) installed in an industrial facility (1) such as textile, dyeing, food processing, paper making, food waste treatment, sewage treatment, metal processing, An apparatus for recovering organic solvents such as oil mist and VOCs contained in an exhaust gas,
A blower 10 connected to the duct 5 to move the exhaust gas moved along the duct 5 to a high pressure;
A first body 21 in which a first inlet 21a is formed on the front side and a first outlet 21b is formed on the rear side so that the exhaust gas flowing from the blower 10 flows in and is discharged from the blower 10 A plurality of heat transfer tubes 22 which are connected to the first body 21 and are formed in the shape of a tube in the shape of a tube so as to move the exhaust gas and are arranged in the heat transfer tube 22 in the lower part of the rear side of the first body 21, A heat exchanger (20) in which a first recovering part (23) for recovering organic solvents such as oil mist and VOCs is disposed;
A cooling water supply means 30 connected to the heat exchanger 20 for circulating cooling water to the inside of the first body 21 of the heat exchanger 20;
A moving pipe 40 having a tube shape connected to a first outlet 21b of the first body 21 of the heat exchanger 20 and having a temperature sensor 41 at an outer circumferential side thereof;
A second body 51 in which a second inlet 51a is formed on the front side and a second outlet 51b is formed on the rear side so that the exhaust gas flowing from the moving pipe 40 is introduced and discharged, And a plurality of dust collecting electrode parts 52 formed in the shape of a circular tube inside the second body 51. The front and rear ends of the plurality of dust collecting electrode parts 52 A discharge electrode portion 54 is inserted in the longitudinal length direction from the center portion on the front side of the dust collecting electrode portion 52 and a discharge electrode portion 54 is provided on the front end portion of the discharge electrode portion 54 A connection hole 56 is provided between the edge of the plate 53 facing the front side edge portion of the discharge frame 55 and a connection hole 56 is formed in the lower portion of the second body 51 A second recovery unit 57 for recovering organic solvents such as oil mist and VOCs adsorbed and discharged on the inner surface of the electrode unit 52, The electrostatic precipitator 50 is installed;
The electrostatic precipitator 50 is connected to the second outlet 51b of the second body 51. The electrostatic precipitator 50 discharges the exhaust gas separated from the organic solvents such as oil mist and VOCs A discharge pipe (60);
And an organic solvent recovery device for recovering the organic solvent contained in the exhaust gas. The method according to claim 1,
Wherein the heat transfer pipe (22) of the heat exchanger (20) is installed so as to be inclined downwardly toward the rear side. The method according to claim 1,
Wherein the electric dust collector (50) has a cutout (52a) formed in the longitudinally lower portion of the dust collecting electrode portion (52). The method according to claim 1,
Wherein the dust collecting electrode portion (52) and the discharge electrode portion (54) of the electrostatic precipitator (50) are installed so as to be inclined downward in the backward direction. The method according to claim 1,
Wherein the discharge electrode part (54) of the electrostatic precipitator (50) is formed in the form of a circular rod or a polygonal prism. An oil mist and an organic solvent recovery method using an oil mist and an organic solvent recovery device included in the industrial exhaust gas of claim 1,
The operation of the heat exchanger 20 and the cooling water supply means 30 is delayed for a predetermined period of time and the high temperature exhaust gas is introduced into the electrostatic precipitator 50 to discharge the dust collecting electrode portion 52 of the electrostatic precipitator 50, An initial operation step (S1) of separating organic solvents such as residual oil mist and VOCs trapped on the electrode part (54) from the dust collecting electrode part (52) and the discharge electrode part (54) as much as possible;
After the organic solvents such as residual oil mist and VOCs trapped by the dust collecting electrode unit 52 of the electrostatic precipitator 50 are separated as much as possible by the initial operation step S1, the heat exchanger 20 and the cooling water The supply means 30 is operated to cool the exhaust gas flowing into the heat transfer pipe 22 of the heat exchanger 20 to condense and discharge organic solvents such as oil mist and VOCs contained in the exhaust gas, A recovery step S2;
When the exhaust gas from which a part of the organic solvents such as oil mist and VOCs is recovered by the primary collecting step S2 flows into the electrostatic precipitator 50, the corona discharge of the electrostatic precipitator 50 is performed, A second recovery step (S3) of adsorbing and collecting organic solvents such as oil mist and VOCs and recovering the collected organic solvents;
The exhaust gas, in which the organic solvents such as oil mist and VOCs are completely separated, is discharged to the outside by the secondary collection step (S3). When the recovery of the organic solvents such as the oil mist and the VOCs is completed, the heat exchanger And the cooling water supply means 30 are stopped and organic solvents such as oil mist and VOCs remaining in the heat exchanger 20 and the electrostatic precipitator 50 are sufficiently removed and then the blower 10 and the electrostatic precipitator 50);
And an oil mist and an organic solvent recovery method using an oil mist and an organic solvent recovery device included in an industrial exhaust gas.

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